Add PackageModelSyntax.dll

This reflects swiftlang/swift-package-manager#7467

(cherry picked from commit 56d9158)

Author: hjyamauchi

platforms/Windows/cli/cli.wxs

@@ -221,6 +221,9 @@
       <Component>
         <File Source="$(DEVTOOLS_ROOT)\usr\bin\PackageModel.dll" />
       </Component>
+      <Component>
+        <File Source="$(DEVTOOLS_ROOT)\usr\bin\PackageModelSyntax.dll" />
+      </Component>
       <Component>
         <File Source="$(DEVTOOLS_ROOT)\usr\bin\SPMBuildCore.dll" />
       </Component>